Diestock



R. B. PEALER May 5, 1931.v

DIESTOUK Filed Sept. l0, 1930 gwuentoc Patented May 5, 1931 Vmartial).s'ra'rns Partantg etnici-:7

. RoBER'rB. PEALER, or'wnnnnn, onto, AssIGNoR 'ro'finn fBomann COMPANY,or

, WARREN, 01110, A CORPORATION oF oHIo DIESTOCK `Application measeptember 1o, 1930. serial No. 480,929.

This invention relates to a' die stock of that type, wherein chasers arefixedly mounted 1n a suitable barrel which has a sleeve adapted to enteran actuating frame. The actuating frame preferablyrcarriesa rpawl whichengages ratchet teeth for rotation with `the sleeve. Preferably theratchet teeth are on a ring which is permanently but rotatably mountedin `the ,handle frame carrying the pawl, the ring having akey-wayconnection with the driven sleeve.

Tools of the above character have been manufactured and marketed by mylassignee for many years, there being provided a series of barrels withvheads and chasersof different dimensions for different sizes of pipesbut with identical sleeves, so that all of the barrels cooperate withthe same actuating frame.

It is the object of my invention to provide a tool of the characterdescribed which has all of the advantages of the tool marketed by myassignee, and which has the further advantage of providing a moresatisfactory chip clearance and. means whereby the chaser teeth may bereadily oiled in their most active region asthey continue to act on thepipe.

My invention, though of specific character, does remedy a disadvantageof many years standing in the die stocks of the type referred to asheretofore marketed. This-.invention is illustrated in the drawing andis hereinafter described in detail. Y

In the drawings Fig. l is a face view of a die stock embodying myvinvention;tFig.I2 is a face viewV omitting the Chaser-'holding ring, theactuating frame being partly in section to show the action of the pawland ratchet ring; Fig. 3 is an edge view with the actuating frame insection; Fig. 4 is a section of the barrel through the chasers parallelwith Figs.

1 and 2, and looking away from the actuating frame; Fig. 5 is a detailin cross section on a'chordal plane, indicated by the linev 54-'5 onFig. 4. y" l As shown in the drawing, indicates the barrel or drivenchaser-carrier for my die stock, with which the present invention isconcerned. This barrel has a sleeve-like portion 1l coacting with thedriving mechanism as hereinafter explained,V Beyond this sleeve? ,radialmovement'of the chasers. Y

like portion is Van annular outwardly extending flat ring-likeportion l2which carries on its'outer 'face chaser housings peach, formed bytheparallel spaced walls of longitudinal projections 13. The annularsleeve, the flat extension and housings are preferably.V all a singleintegral casting. The parallel sided Arecess constituting a Chaserhousingvis open at the inner and outer end, measured'radially. The spaceis also open at the far end ofthe frame measured longitudinally. f, I

The chasers,.designated 20, are plain rectangular blockshavingparallelsides, parallel top and bottom edges, a distant end.slightly convex but substantially -at right angles tothe sidesand'fedges, and cutting teeth 21 at the inner edge. Such chasers areadapted to be radially mounted in the housings but they have'no coactingpins or shoulders preventing movement therein. This lends to simplicityin the chaser as it may be made of a. simple rectangular block. Thisis-of importancesince the necessary hardening of the chaser is liable tocause cracks or weakening strains where any shoulderso'r notches areformed in them. l To Vhold the chasers bothagainst outward movementlongitudinally of the, frame and outward movement radially thereof, Iprovide a cup-like ring which has an annular flatportion extending overthe eXtreme faces of the Chaser housings and also` has a cylindricalflangefl overlapping the outerA ends of thehousings. Suitable screws 40pass through the fiat portion of the ring 30 and are threaded Vinto thedifferent housing lugs 13, locking the parts rigidly together. VThisiianged ring therefore by reason of its fiat portion limits `theVoutward longitudinal 'movement of the chasers andby reason of itscylindrical flange, limits the outward radial movement. Preferably, thechasers stand a little higher thanV the housings, as shown in Fig. 5, sothat the ring `engages the chasers directly and clampsthem rigidly inplace, thisV clamping preventing also anyinw'ard The description `justgiven 0f the'barrel applies equally well to the former construction ofmy assignee above referred to. How-- ever, in that construction themembers constituting the Chaser housings extended con-- tinuously in anarcuate direction from one Chaser :passageway tothe next, thuspresenting a long arcuate lug, the opposite ends of which make walls oftwo Chaser passageways; `and in that constructionthe cylindrical flangef the cup-like ring 'extended for the full height of the chasers andbeyond them to cover the outer ends of the Chaser housings and overlapthe periphery of the barrel head beyond the chasers. Thus the ch-aserswere entirely closed in at their outer ends, and 'arcuate pocketsexternally closed were left "between the vdifferent chasers.

` 'Ifnthepresent' invention I make individual lugs Yforthe respectivehousings leaving wide Fs'p'acesopent'o' the exterior between each `hous-{ing-and the nextand I make the vcylindrical ilange on the ring so thatit extends only part-wa'y along the Chaser housings, the extent as:shown being approximately twothirds of the Chaser height. I have foundthat the abutment vthus provided for the chasers is 'amply sufficient'to receive the ra- ,dial-thrust thereof vand holds them as effectivelyin placeas the former construction. *My new Construction, however, hasthe decided advantage `in that it provides open yspaces between thesuccessive Chaser housings for about one-third the height of thosehousings, this open space leading directly outwardly from' the inner orfaceengaging edge of therchasers.

By reason of the wide radial openings reaching from one Chaser housingto the next "-andpextending freely from the pipe region to the exterior,my die stock discharges the chips made `by the-chasers as'fast asformed, insteadof allowing them to accumulate with- -in the barrelyasfinthe former Construction.

It should be Vnoted lthat the widest chip made by the chasers is at theadvance edge rof thechaser7 which is adjacent the 4radial openings. A'-openings, allow these wide chips and the ad- My die stock, by reasonof its acent Chips to fall out through `the opentings, keepingt-h'e diestock constantly clean. If any chirps `should inadvertently beretainedby theoil, they may be readily poked out from the front throughthe openings, by theinsertion of a screw driverv blade or'other toolwhile theV die stock is in any cutting position on the pipe. Incontra-distinction to this, the former diestock allowed the chips toaccumulate inthe pockets between the ad- Ijacent chasers. As these chipsfellby gravity into the pockets 'between the housings, the'rotatingbarrel carriedthem toa position above the `pijewhere theynaturally fell on the pipe and'slid'toward the `cutting edge ofthechaser u-mofvinglupwardly on thele'ft side of the pipeysothatsuch.chipswer'e liabl'eito pass under the cutting edge and make a ragged cut.

The radial openings in my die stock also provide spaces for theinsertion of the point of an oil can to apply oil directly to thecutting teeth of the Chasers, vand this may be done as the cuttingprogresses.

The experience of myself and of my assignee with my improved die stock,and the reception which has been immediately accorded it by the trade,demonstrates that bythe simple change made I have greatly improved theformer die stock and removed th'esupposedly `inherent disadvantagethereof. Incidentally, there is an advantage for 'the manufacturer of mydie stock, in that my abutment ring, by reason of the vrelatively Vshortcylindrical flange, which may be conveniently made by'stamping withoutunduly drawing the metal.

As heretofore indicated, any suitable means "may be employed lforrotating the barrel of my die stock. As shown I have employed theannular handle frame f5() carrying a ratchet pawlQ pressed inwardly by aspring 50, the pawl being faced in' either direction, or in anidleposition half way @between them, Aby the pulling outof the pawl shank byits head andthe turning thereof 90 until a wing'56 'on 'the vhead is outof alignment with the slot inthe frame.

The pawl of the ratchet ring, instead of engaging directly with teethformed on the bar rel, as might be'the Case, engages, in the emfbodimentillustrated, a ring G0 rotatably mounted in the handle frame and havingteeth on its outer periphery. 0n its inner peripherythis ring has one ormore grooves adapted 'to receive yribs 1G on 'the sleeveof the Chaserbarrel. Then the barrel is inserted, these ribs v16 pass through notches58 `in the yratchetl frame, and then as soon as the frame has moved ashort distance with reference to 'the barrel, the notches areCarriedlout of reg- 4istration with ribsand then the portion of thecomprisinga hollow barrel open atbothlends, a set of chaser housingscarried by the barrel at one end thereof and each having a-radial vnotchthrough it, there being clearance openings between successivehousings,chasers occupying said notches and a clamping ring overlapping the outerlongitudinal ends ofthe housings and having a cylindrical flangereceiving the outward tlrrust of the chasers and overlappingtheclea'rance openings `for partway only of'their'longitudinal height,whereby said openings arev available beyond -theend'of thering flangeleading outwardly from a region adjacent to the irst cutting edge of thechasers.

2.v A driven barrel for a die stock, comprising a sleeve, an outwardlyextending head thereon and chaser-lugs arranged in pairs on thelongitudinally outer face of the head, there being parallel sided radialpassageways to the exterior between the two lugs oli each pair, andwider passageways to the exterior between successive pairs, rectangular'chasers occupying said parallel sided passageways, and a cup-like ringsecured to the housings and having a flange overlapping only the outerlongitudinal portions of the chasers and their housings and thespacebetween so as to receive theoutward thrust of the chasers and at thesame time leave open radial spaces to the exterior along the face of thebarrel head and between the chaser housings.

3. In a die stock, the combination with a driving frame, of a drivenbarrel adapted to coact therewith, said barrel having a sleevelikeportion adapted to enter the iframe, a radially extending annular headon the sleevelike portion and lugs on the outer face of the headarranged in groups, each group comprising a pair of parallel lugs, suchpair leaving between them a space for a Chaser, chasers mounted in thelug space mentioned, and there being radially extending iiaring spacesto the exterior between successive pairs of lugs, and a clamping ringhaving an annular Hat portion overlapping the longitudinal ends of theChaser lugs and secured to such lugs and having a cylindrical sleevewhich extends across the radial ends of the lugs and chasers and formsan abutment limiting their outward movement of the chasers, said angeextending circumferentially across the space between the chaser housingsbut extending longitudinally for only a portion of the height of suchspace whereby said space is left open for a material height along theouter face of the barrel head, thus providing a clearance for chipsleading directly radially outward from the advance cutting edge of thechasers.

4. In a die stock, the combination of a Chaser carrying frame,comprisinga rotary hollow barrel open at both ends with radial notches open inwardand outwardly radially and atthe outer end longitudinally, chasersoccupying the notches, there being radial passageways through the wallof the barrel alternated with the Chaser notches, and a clamping ringL-shaped in radial cross section and' a driving portion and acylindrical head larger than the driving portion and connected with itby a lateral annular extension, chasers mounted in radial notches insaid head, the inner longitudinal edges of the chasers beingsubstantially flush with said lateral extension, clearance openingsformed through the head between adjacent chasers, the inner longitudinalportion of said openings coming to substantially the plan-e as the inneredges of the chasers, and a clamping ring of L shape is radial crosssection having a iiat portion overlying and bearing against the outerlongitudinal edges of the chasers and having a cylindrical flangeoverlying and bearing against the outer radial ends of the chasers, saidflange terminating short of the longitudinal inner extremity of theradial openings through the enlarged head.

In testimony whereof, I hereunto atlix my signature.

ROBERT B. PEALER.

engaging the outer longitudinal edges of the y chasers and their rearradial ends, the portion of the ring which engages the rear ends of thechasers terminating short of their inner longitudinal edges to expose aportion of the outer ends of the chasers and to allow access to theradial openings between the chasers.

5. In a die stock, the combination of a hollow barrel open at both endsand having

